Sable V6-3.0L VIN U (1999)
Blower Motor Resistor: Description and Operation
Blower Motor Switch Resistor
The A/C blower motor resistor assembly operates in the following manner:
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The heater blower motor switch resistor assembly is located on the passenger side of the A/C evaporator housing behind the glove compartment.
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Three resistance elements are mounted on the resistor board to provide four A/C blower motor speeds.
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Depending on the heater blower motor switch position, series resistance is added or bypassed in the A/C blower motor circuit to decrease or
increase A/C blower motor speed.
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An overheating protective device (thermal limiter) prevents heat damage to the A/C evaporator housing.
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Overheating of the resistor coils can occur when the system airflow is stopped or reduced as a result of the A/C blower wheel becoming locked or
unable to turn freely.